Jeff Pan wrote:
> Passing reference as parameter to subroutine is as easy as the normal
> way.And,if u pass some types of parameter such as hash,array,or handle
> to subroutine,using reference instead is more safer.
> for example,such below code is right:
It is, however it could be better.
> my (%hash,@array);
> &sub_test(\%hash,[EMAIL PROTECTED]);
& has special meaning so it should be dropped when not needing
particular special behavior.
> sub sub_test{
> my ($hash_ref,$array_ref)[EMAIL PROTECTED];
ok.
> my %hash=%$hash_ref;
> my @[EMAIL PROTECTED];
This isn't needed actually and it only makes unnecessary overhead as
keys/values are copied, so you immediately lost benefit by passing by
reference.
It's better to access them directly like,
$hash_ref->{key}
$array_ref->[0]
> do something...
> }
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